| Summary: | A method was developed for determining the effects of the
amount and quality of sizing on the physical properties of cotton
warp yarns and on their performance during weaving and abrasion
tests. The strength, elongation under a 35-gram load and at rupture,
and the permanent set under a load of 35 gram were measured on
yarns before and after sizing them with white-potato starch; after
weaving and removal from the cloth; and before and after abrasion
in a laboratory apparatus simulating the effects of a loom. The
experimental results show that the sized yarns have greater strength,
less elongation, lower permanent set, and are more uniform in their
physical properties, and possess better weaving qualities than unsized
yarns. A simple mill method for the testing and control of
sized yarns, based on these results, is suggested.
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